Domain Name: concentration.com.cn ROID: 20240731s10011s98171447-cn Domain Status: ok Registrant: 徐雄英 Registrant Contact Email: musunchuib49@126.com Sponsoring Registrar: 北京新网数码信息技术有限公司 Name Server: dm2.dns.com Name Server: dm1.dns.com Registration Time: 2024-07-31 13:41:14 Expiration Time: 2025-07-31 13:41:14 DNSSEC: unsigned